Robert Sciarrino/The Star-LedgerTwo were killed and another two were in critical condition after their Jeep crossed into oncoming traffic and flipped onto its side in Rockaway Township early Sunday morning, police said.

ROCKAWAY TOWNSHIP — Two people were killed and another two were in critical condition after their Jeep crossed into opposite lane of traffic and flipped onto its side on Green Pond Road early Sunday morning, township police said.

Police had not yet released the identities of those involved in the accident, which killed a 20-year-old female driver from Rockaway Township and her 21-year-old male passenger from Franklin, police said. Two other passengers — a 21-year-old male from West Milford and a 22-year-old male from Montague — were still critical condition, police said.

Township police officers and fire department officials responded to a report of a serious motor vehicle accident on Green Pond Road near the Jefferson border at 1:03 a.m., police said.

A 2001 Jeep Wrangler was found lying on its side in a wooded area off the roadway, police said. Officers and first-aid squad members immediately began medical treatment on those injured in the crash upon arrival, police said.

It appeared the Jeep was traveling north on Green Pond Road when vehicle's driver lost control and crossed into the opposite lane of traffic before it overturned and crashed off the roadway, police said.

The Rockaway Township Police Department was still investigating the accident and asks anyone with information to contact traffic officers Michael Hatzimihalis or Norman McAlister at 973-625-4000.